[patch] Fix i386-mingw32 build failure

[Ross Ridge]

Christopher Faylor wrote:
>The consensus seemed to be that this was not the way to fix the problem.

The consensus also seemed to be that it was just an aspect of a larger
problem that no good solution had been proposed to solve yet.

>I suggested that modifying pex-* functions to understand #! scripts
>might be the best way to deal with this.

It seems to be a rather convoluted and complicated way of tricking the
newly built compiler driver to run a specific version of a program.
Especially since the #! hack currently used in the Makefile might get
replaced by some other hack.

						Ross Ridge